This is my first post, so if I'm missing protocol on posting an intro or something, please school me and I'll correct my bad behavior.

A friend asked me for info on this revolver. I have not seen the piece and have no info beyond what she gave me, which I'll detail below the pic:

It's about 14 1/2" oal, they gave me the weight at approx. 9 lbs and it's a smoothbore barrel, approx. .45 caliber. Cylinder held 12 rounds. German manufacture allegedly, pre WWI (deduced from the proof markings). The markings were given to me as:

2 ga NGP. M/7m

on the cylinder. No markings reported on either the frame or the barrel. The trigger looks like it should fold but it doesn't.